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What is the relation of the ratio of rotor current limits and the ratio of lower limit to upper limit current?(a) ratio of rotor current limits = ratio of lower limit to upper limit current(b) ratio of rotor current limits > ratio of lower limit to upper limit current(c) ratio of rotor current limits < ratio of lower limit to upper limit current(d) no relation between ratio of rotor current limits andratio of lower limit to upper limit currentI got this question in an international level competition.I want to ask this question from Motor Starters, Calculation of Resistance Steps & Design of Field Regulators topic in division Design of Small Electrical Machines, Starters and Field Regulators of Design of Electrical Machines

Answer»

Right choice is (a) ratio of ROTOR current LIMITS = ratio of lower LIMIT to upper limit current

Best EXPLANATION: The ratio of rotor current limits and the ratio of lower limit to upper limit current are first CALCULATED. The ratio of rotor current limits is approximately equal to the ratio of lower limit to upper limit current.



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